... the hard, outer part of a some animal& apos;s mouth. Birds, octopi, squid, and other animals have beaks. Some dinosaurs had them too. biped A biped is an animal that walks on two legs. ... chicken A chicken is a farm animal. claw A claw is a hard, sharp, curved nail on the feet of some animals. Bears, cats, birds, dinosaurs, and many other animals have claws. cockatoo ... animals or plants that may become extinct soon. Many birds species are endangered. extinct When a group of animals or plants goes extinct, they are gone forever. Some extinct animals...